如何在org-mode中使用graphviz画流程图
缘起
理论上我在记录笔记中尽量使用全文字来记录，尽量不用图片，但有时候，文字在表达一些图表内容时，还是存在一定有困难，一个简单的图表用很多文字表达，而且准备性还有困难。在网上看视频时看到用graphviz来画图的演示，感觉能一定程序上满足我的需求。
关于graphviz
http://www.graphviz.org/ graphviz可以画图的类型：http://www.graphviz.org/gallery/
安装
在安装org-roam v1版本时，安装了graphviz，下载地址：https://graphviz.org/download/
安装完成后，确认 dot.exe 在环境变量的 path，这里必须使用windows的环境变量设置
在配置中加入：
(org-babel-do-load-languages
'org-babel-load-languages
'(;; other Babel languages
(dot . t)
))
使用graphviz画图
hello world图
#+NAME: A hello world dot graph demo svg format
#+begin_src dot :file images\hello-world.svg :cmdline -Kdot -Tsvg
digraph G {
Hello->World
}
#+end_src
svg格式
可以画彩色且很复杂的图，源码来自graphviz gallery
#+NAME: A dot graph demo svg format
#+begin_src dot :file images\temp_graphviz.svg :cmdline -Kdot -Tsvg
graph Color_wheel {
graph [
layout = neato
label = "Color wheel, 33 colors.\nNeato layout"
labelloc = b
fontname = "Helvetica,Arial,sans-serif"
start = regular
normalize = 0
]
node [
shape = circle
style = filled
color = "#00000088"
fontname = "Helvetica,Arial,sans-serif"
]
edge [
len = 2.7
color = "#00000088"
fontname = "Helvetica,Arial,sans-serif"
]
subgraph Dark {
node [fontcolor = white width = 1.4]
center [width = 1 style = invis shape = point]
center -- darkred [label = "0°/360°"]
darkred [fillcolor = darkred]
brown [fillcolor = brown]
brown -- center [label = "30°"]
olive [fillcolor = olive]
olive -- center [label = "60°"]
darkolivegreen [fillcolor = darkolivegreen fontsize = 10]
darkolivegreen -- center [label = "90°"]
darkgreen [fillcolor = darkgreen]
darkgreen -- center [label = "120°"]
"dark hue 0.416" [color = ".416 1 .6" fontcolor = white]
"dark hue 0.416" -- center [label = "150°"]
darkcyan [fillcolor = darkcyan]
darkcyan -- center [label = "180°"]
"dark hue 0.583" [color = ".583 1 .6" fontcolor = white]
"dark hue 0.583" -- center [label = "210°"]
darkblue [fillcolor = darkblue]
darkblue -- center [label = "240°"]
"dark hue 0.750" [color = ".750 1 .6"]
"dark hue 0.750" -- center [label = "270°"]
darkmagenta [fillcolor = darkmagenta]
darkmagenta -- center [label = "300°"]
"dark hue 0.916" [color = ".916 1 .6"]
"dark hue 0.916" -- center [label = "330°"]
}
subgraph Tue {
node [width = 1.3]
"hue 0.083" -- brown
"hue 0.083" [color = ".083 1 1"]
"hue 0.125" [color = ".125 1 1"]
"hue 0.166" -- olive
"hue 0.166" [color = ".166 1 1"]
"hue 0.208" [color = ".208 1 1"]
"hue 0.250" -- darkolivegreen
"hue 0.250" [color = ".250 1 1"]
"hue 0.291" [color = ".291 1 1"]
"hue 0.333" -- darkgreen
"hue 0.333" [color = ".333 1 1"]
"hue 0.375" [color = ".375 1 1"]
"hue 0.416" -- "dark hue 0.416"
"hue 0.416" [color = ".416 1 1"]
"hue 0.458" [color = ".458 1 1"]
"hue 0.500" -- darkcyan
"hue 0.500" [color = ".500 1 1"]
"hue 0.541" [color = ".541 1 1"]
node [fontcolor = white]
"hue 0.000" [color = ".000 1 1"]
"hue 0.000" -- darkred
"hue 0.041" [color = ".041 1 1"]
"hue 0.583" -- "dark hue 0.583"
"hue 0.583" [color = ".583 1 1"]
"hue 0.625" [color = ".625 1 1"]
"hue 0.666" -- darkblue
"hue 0.666" [color = ".666 1 1"]
"hue 0.708" [color = ".708 1 1"]
"hue 0.750" -- "dark hue 0.750"
"hue 0.750" [color = ".750 1 1"]
"hue 0.791" [color = ".791 1 1"]
"hue 0.833" -- darkmagenta
"hue 0.833" [color = ".833 1 1"]
"hue 0.875" [color = ".875 1 1"]
"hue 0.916" -- "dark hue 0.916"
"hue 0.916" [color = ".916 1 1"]
"hue 0.958" [color = ".958 1 1"]
edge [len = 1]
"hue 0.000" -- "hue 0.041" -- "hue 0.083" -- "hue 0.125" -- "hue 0.166" -- "hue 0.208"
"hue 0.208" -- "hue 0.250" -- "hue 0.291" -- "hue 0.333" -- "hue 0.375" -- "hue 0.416"
"hue 0.416" -- "hue 0.458" -- "hue 0.500" --"hue 0.541" -- "hue 0.583" -- "hue 0.625"
"hue 0.625" -- "hue 0.666" -- "hue 0.708" -- "hue 0.750" -- "hue 0.791" -- "hue 0.833"
"hue 0.833" -- "hue 0.875" -- "hue 0.916" -- "hue 0.958" -- "hue 0.000"
}
subgraph Main_colors {
node [width = 2 fontsize = 20]
red [fillcolor = red fontcolor = white]
orangered [fillcolor = orangered]
orange [fillcolor = orange]
gold [fillcolor = gold]
yellow [fillcolor = yellow]
yellowgreen [fillcolor = yellowgreen]
deeppink [fillcolor = deeppink fontcolor = white]
fuchsia [label = "fuchsia\nmagenta" fillcolor = fuchsia fontcolor = white]
purple [fillcolor = purple fontcolor = white]
blue [fillcolor = blue fontcolor = white]
cornflowerblue [fillcolor = cornflowerblue]
deepskyblue [fillcolor = deepskyblue]
aqua [fillcolor = aqua label = "aqua\ncyan"]
springgreen [fillcolor = springgreen]
green [fillcolor = green]
purple -- fuchsia -- deeppink -- red
cornflowerblue -- blue -- purple
cornflowerblue -- deepskyblue -- aqua [len = 1.7]
aqua -- springgreen -- green -- yellowgreen -- yellow
yellow -- gold -- orange -- orangered -- red [len = 1.6]
orange -- "hue 0.083"
deeppink -- "hue 0.916"
deeppink -- "hue 0.875"
red -- "hue 0.000"
yellowgreen -- "hue 0.250"
blue -- "hue 0.666"
yellow -- "hue 0.166"
gold -- "hue 0.125"
green -- "hue 0.333"
springgreen -- "hue 0.416"
aqua -- "hue 0.500"
cornflowerblue -- "hue 0.583"
deepskyblue -- "hue 0.541"
purple -- "hue 0.791"
purple -- "hue 0.750"
fuchsia -- "hue 0.833"
}
subgraph Light_colors {
node [width = 2 fontsize = 20]
node [shape = circle width = 1.8]
edge [len = 2.1]
pink [fillcolor = pink]
pink -- red
lightyellow [fillcolor = lightyellow]
lightyellow -- yellow
mediumpurple [fillcolor = mediumpurple]
mediumpurple -- purple
violet [fillcolor = violet]
violet -- fuchsia
hotpink [fillcolor = hotpink]
hotpink -- deeppink
"light hue 0.250" [color = ".250 .2 1"]
"light hue 0.250" -- yellowgreen
lightcyan [fillcolor = lightcyan]
lightcyan -- aqua
lightslateblue [fillcolor = lightslateblue]
lightslateblue -- blue
lightgreen [fillcolor = lightgreen]
lightgreen -- green
lightskyblue [fillcolor = lightskyblue]
lightskyblue -- deepskyblue
peachpuff [fillcolor = peachpuff]
peachpuff -- orange
"light hue 0.416" [color = ".416 .2 1"]
"light hue 0.416" -- springgreen
}
subgraph Tints {
node [width = 1]
edge [len = 2.4]
"hue 0 tint" -- pink
"hue 0 tint" [color = "0 .1 1"]
"hue 0.041 tint" [color = ".041 .1 1"]
"hue 0.083 tint" -- peachpuff
"hue 0.083 tint" [color = ".083 .1 1"]
"hue 0.125 tint" [color = ".125 .1 1"]
"hue 0.166 tint" -- lightyellow
"hue 0.166 tint" [color = ".166 .1 1"]
"hue 0.208 tint" [color = ".208 .1 1"]
"hue 0.250 tint" -- "light hue 0.250"
"hue 0.250 tint" [color = ".250 .1 1"]
"hue 0.291 tint" [color = ".291 .1 1"]
"hue 0.333 tint" -- lightgreen
"hue 0.333 tint" [color = ".333 .1 1"]
"hue 0.375 tint" [color = ".375 .1 1"]
"hue 0.416 tint" -- "light hue 0.416"
"hue 0.416 tint" [color = ".416 .1 1"]
"hue 0.458 tint" [color = ".458 .1 1"]
"hue 0.5 tint" -- lightcyan
"hue 0.5 tint" [color = ".5 .1 1"]
"hue 0.541 tint" -- lightskyblue
"hue 0.541 tint" [color = ".541 .1 1"]
"hue 0.583 tint" [color = ".583 .1 1"]
"hue 0.625 tint" [color = ".625 .1 1"]
"hue 0.666 tint" -- lightslateblue
"hue 0.666 tint" [color = ".666 .1 1"]
"hue 0.708 tint" [color = ".708 .1 1"]
"hue 0.750 tint" -- mediumpurple
"hue 0.750 tint" [color = ".750 .1 1"]
"hue 0.791 tint" [color = ".791 .1 1"]
"hue 0.833 tint" -- violet
"hue 0.833 tint" [color = ".833 .1 1"]
"hue 0.875 tint" [color = ".875 .1 1"]
"hue 0.916 tint" -- hotpink
"hue 0.916 tint" [color = ".916 .1 1"]
"hue 0.958 tint" [color = ".958 .1 1"]
edge [len = 2]
"hue 0 tint" -- "hue 0.041 tint" -- "hue 0.083 tint" -- "hue 0.125 tint" -- "hue 0.166 tint" -- "hue 0.208 tint"
"hue 0.208 tint" -- "hue 0.250 tint" -- "hue 0.291 tint" -- "hue 0.333 tint" -- "hue 0.375 tint" -- "hue 0.416 tint"
"hue 0.416 tint" -- "hue 0.458 tint" -- "hue 0.5 tint" --"hue 0.541 tint" -- "hue 0.583 tint" -- "hue 0.625 tint"
"hue 0.625 tint" -- "hue 0.666 tint" -- "hue 0.708 tint" -- "hue 0.750 tint" -- "hue 0.791 tint" -- "hue 0.833 tint"
"hue 0.833 tint" -- "hue 0.875 tint" -- "hue 0.916 tint" -- "hue 0.958 tint" -- "hue 0 tint"
}
// © 2022 Costa Shulyupin, licensed under EPL
}
#+end_src
png格式
使用png格式的话，只需将保存文件名改为.png结尾，参数由 -Tsvg 改为 -Tpng
